Some MUAs (namely Outlook) use localized prefixes for replied-to and
forwarded mail. With this patch aerc replaces known localized prefixes
and repetitions with the common Re: prefix.
Link: https://office-watch.com/2014/outlook-reply-forward-prefixes/
Signed-off-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>